Device for concentration of light-rays



W. .h HEVEY.

EVKCE FOR CONCENR'N 0? LGHT AYS,

AWUSATION mi@ wav. 26. 19H.

UNITED STATESATLNT OFFICE.

WALTER JAMES HARVEY, F TORONTO, ONTARO, CANADA.

DEVICE FOR CONCENTRATION Oli LIGHT-:BIAYS A Application led November 26, 1917.

To all/07min t 'may concern Be it known that L Warren Jarras HauviiY, a subject of the King ol. Great Britain,

and resident of the city ol Toronto7 county 0i York, Province of Ontarioz in the Dominion of Canada, have invented certain new and useful Improvements in Devices for Concentration oi Light-Rays, described in the following specification and illustrated in the accompanying drawings that form part of the same.

The principal objects ot the invention are to devise an apparatus by means of which rays ol light may be gathered and iocused etlectively in the application of light in therapeutic and ophthalmic work and to devise an aprarratus which may be readily op erated in focusing the gathered rays ol' light for various distances for various uses.

The principal feature of the invention consists in the novel construction ot device whereby a plurality of individual reflecting` members are supported on movable members adapted to be operated in unison and in relatively proportionate movement to eliiect a concentration ot the rays ot light upon varying .'[ioci and whereby the indiifidual reflecting members may be separately adjusted.

ln the accoinpanying` drawings Vliigurc I is a `trent elevational view ot the device.

Fig. 2 is a longitudinal mid-sectional view through the line ci-7) of Fig. 1. p

Fig. 3 is an enlarged perspective detail oi one ot the individual reflectors and its supporting and connecting members.

Referring to the accompanying drawings it will be seen that a ring 1 is rigidly sup ported upon a base 2 which may be el; any suitable design. The ring 1 is termed with a plurality of radial slots 3 on its inner side and in these slots are secured the outer ends et a plurality of radially arranged bars Ll.

The inner ends of the bars 4l are secured in a circular member 5 which is provided with a cylindrical-shaped extension 6. The member 5 is formed with a centrally arranged longitudinal hole 7 countersunk at one end in which a spindle 8 is rotatably supported, said spindle having` a head 9 resting in the countersunh end et the hole Y. The opposite end of the spindle is supported in a bearing 10 in a bracket 11 supported trom the base.

A crank handle 12 secured to the outer Specification of Letters Patent.

Patented Feb. 1, 19,91.

Serial No. 204,060.

end et the spindle in order to rotate the same.

Each olf the bars l has pivotally connected thereto a plurality ot rods 13. These rods are preferably arranged in gradual diminishing;l length as they extend. outwardly from the center and the, ends la of said rods are connected together by the link bars 15 which are iiiiivotally secured to said rods.

The inner ends ot' each of the linl: bars 15 have pivotally connected thereto link members 16 and the other ends of said links are pivotally secured in radial slots formed in a nut ll which is threaded upon the spindle 8 between the bearing 10 and the end ot the extension (i.

The rotation of the spindle causes lthe nut to travel thereon and operate the links 16 and through them to swing the multiple sets ot rods 18 upon their pivots through the connecting linlz bars 15.

lt will. be readily understood that on account ot' the difference in length ot the rods 13 the angularity et these rods will change inl a. di Herent proportion with the movement oit the nut.

Flach oi the rods lil is Aforrnml with a right angular-ly arranged head 19 and in this head is slidably mounted a pin 2() to the outer end ot which is pivotally secured a small cup 1S which contains a small concaved reflector. Three set screws la are threaded in the head 19 and enga theI under side of the cup and by adjusting these the reflector may be ad- Iiusted to any desirable angle. The cup is held in contact with the set screws by the tension of a coil spring Q1 encircling the pin 9,0 below the head 19 and ,engaging a nut on the end of said pin.

By adjusting these screws the Vcup may be tilted to any desirable angle. This adjustment is made in order to focus the cups to direct the rays of light inwardly to a focal point and when so adjusted a different focus may be ellgected by the manipulation ot the rods 13 carrying the reflecting meub bers.

The setting of the cup and the relative length of the rods 13 are figured to a proper relation so that by the swinging ot the link bars 15 through the operation of the nut 17 ot the links 16 the rods 13 are swung on their pivots on the bars Il, thus changing, the `toeel point of all oit the reflector members 18 sinlultaneously and in proper proportion to focus at dilerent distances.

It will be understood from this description and from the drawing` that each of the reflecting members operates to increase the light at the focus and that as a great many of these are arranged upon the surface of the device an enormous quantity of light rays will be concentrated and directed to a common focal point.

Such an apparatus allows of a very wide range in use in therapeutic, opthalmic and other scientific work where concentration ot light rays is required and it will be readily seen that by shitting the focus ot the various reflectors in relation to the object upon which the light is to be concentrated, many different results can be obtained and dit'- erent areas covered by the light so roncentrated.

The minor details or construction ot the device in regard to the actual structure of the rods carrying the reflecting members and other means ot individual adjustment may be altered considerably without altering the main feature of the invention.

lWhat l claim as my invention is l. A device for the concentration oi' light rays, comprising a plurality oit rigid radial arms, individual Ymembers of graduated lengths pivotally supported at one end, link bars pivotally connected to the graduated ends of said pivotal members, means for operating said link bars to swing said Ypivotal members upon their pivots, and individual reflecting members secured one to each of said bars.

2. A device for the concentration ot light rays, comprising a frame having a plurality of rigid radial supports, rods pivotalllv arranged upon said supports and formed in gradual decreasing` lengths from the center outwardly in their radial arrangement, link bars connecting the graduated ends of said rods, a threaded spindle rotatably mounted in central arrangement in relation to said links` bars, a nut traveling on said threaded spindle, link members pivotally connected to said link bars and to said nut and adapted to move said link bars to swing said rods upon their pivots at varying angles, and individual reflectors secured at the pivotal ends ot said'rods.

3. ri device tor the concentration ot light rays, comprising a trame having` a plurality ot rigid radial supports, rods pivotally connected to said 1adial supports, individual retlecting members pivotally and adjustahly secured to the pivotal ends of said rods; and means connected to the other ends of said rods swinging them in unison to concentrate the rays ot light reilected from said reflecting members.

device tor the concentration oi light rays, comprising a rigid irame termed ot an outer ring shaped member and a plurality oi' radially arranged bars connected to a rigid center, said center having a central bearing therein, a spindle rotatably mounted in said central bearing, a nut threaded upon said spindle, a plurality of rods pivotally secured to each ot said radial arms and spaced equidistant from each other throughout the length oi said arms, Said rods being arranged in regular graduated decreasing lengths from the center outwardly, link bars pivotally connecting the outer ends ot said rods, means connecting said link bars to said nut, and individual reflecting members secured to the pivotal ends of said rods.

ALTER JAMES HARVEY. 

